Reinforcing-bar for concrete.



J. F. HAVEMEYER.

REINFORCING BAR. FOR CONCRETE.

APPLICTION FILED OC.9.19I4.

` To all 'whom it 'may concern:

f onirica@ A.ironia s. HAVEMEYER, on AnDsLEY-oN-HUDSON, New YORK,

nmnronciNG-BAR son coNcnE'rn.

Be it known that l, Joint F. HVEMEYER,

' a citizen of the United States, and a residen)l of Ardsley-onHudson, i'n. the county of estchester and vState 'of ..New Yorin have invented an Improvement 1n Reinforcing-Bars for Concrete, of which the follow- `ription,.in connection with'the acing des. c companying drawings, isa specification, like letters on'Y the drawings representing like' ports.

The present provement 1n reinforcing bars for concrete construction, one object being to provide a lnormally plane surface .2.

` deformed bar which may readily be bcnt to conform-to curved-portions of a structure.

In the drawings which accompany this specificationul have illustrated severalfforms of 1.irs embodying my invention.

`jure 1 is a plan View of such a bar.

2; a cross section on the line 2-'2 of is Ig. l, and Fig. 3 is a plan view of a modification.

' Referring 4now t'o Figs. l. and-2, the flat bar there illustrated has a deformed'pdrtion on itsulat faces, the deformations comprising a. series of projections 1 rising from a A continuous track or ridge 8 also rises above the normal surface 2 at each side thereof` and extends iongitudinally of the bar, and at a height equal-to on greater than the height of the projections 1.?

-, While the 'bar Vforming the subject matter of the present. invention I nay be 'used on .any type of reinforced concrete worlnit is particularly adapted for y reinforcing -curved structures. In bending vreinforcing steel for use on such structures, it is customary to.

passl the bars through a series of bending rollers to give them the desired curve. Hovvever, in' passing dormed Aor irregularly shaped bars through'the bendingv rollers,

considerable difficulty has beenexperienced on account of 'the vprojections or deforma- -tions which'choke the rollers, not only in- 'juring the latter but also Vtending to fla-tten to the present inyention, in passing through a set of bending rollers, will engage the surface of these rollers with a bearing surface out the deformations on the bars. l, Referring to Fig; 2 of the` drawings, it will be clear that` abar formed4 according,

, 4as provided by the tracks or ridges 3, `while the deformationsl do not necessarily come into actual contact with the rolls. Thus a.

specificati of Lette'rs'ratem. p

'invention vrelates to an imf v when they 'become` worn.

'Patented Feb., i, MM5.

Application led October 9, 1314. Serial No. 865,781. 'i

l bar can be bent easily both without pound` ing and without damage either to itself or to thebending machinery. The shape of the ridge lis not material nor' is it necessary that there be any specified number on the face of 'any lbai'.V y Vihi'le` the ridges provide a suitable surface upon which the bendingr rollers may operate, ne deformed portion .of the bar With'its-V projections rising fromv projections; lVith the deformations running y longitudinally as. in the figure just menttioned, or substantially so as in Fig, and

overlapping each other, a practically 'constant cross section is produced and the projections enter .directly into the tensile strength of the bar. It may be pointed out that, if these projections were directed cross- Wise of the bar they might constitute an effective mechanical bond but wouldnot enter materially 'in the tensile strength of e the bar. According to my invention, however, not only is an effective bond provided Y by the substantially longitudinal projections but-'these projections also contribute inaterially in the4 tensile strength of the bar.

'Aside from the additional strength givem to a 'reinforcing -bar by virtue of the longitudinally disposedV projection, this particular "ilacing of the 'projections simplifies t e rolling of -such bars considerably.` lt has been found' that thisA type of b'ar with. longitudinal projections may be readily rolled inahigh speed mill and the rolls so used maybe easily ydressed The projections in the present case are illustrated :1s-being oblongor lozenge shaped anld preferably disosed in the mannerhereilnabove described although it-is obvious that the 'shape of the projections and their relative positions need not beso limited to produce .a bar within the e concept of my invention. l 4 Among other advantages of reinforcing' steel fashioned in accordance with my inverntionfit may be pointed out that such bars may conveniently be used in reinforcing concrete beams or other partsof a structure to Batera AVEMEYERQ JOHN F 

